Sectional brake-band lining



A ril 8', 1924.

F". A VAlL. SBOT IONAL BRAKE BAND plume Filed June 1. 1922 ATTORNEY Patented Apr. 8, 1924. I

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I I 1,489,620 P T T F I Minoan, NEW Yonx;

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' Application median 1,.

ings, is a full, cleanfand exact escriptioni i This invention relates-to*asectional brakeband lining and-'refers-more' pa'rticu'larlyto the means for fastening the -sections to the hand, the object lbei-ngto provide means I whereby the'worn sections may be-removed individually and-replaced by new oriesWith-i out removing the band fromthe brake drum.

In other words, I have sought to'provid'e a lining in the form ofrelatively short sections mounted upon asuitable support-' ing plate so that they may be manufactured in units and assembled in the brake-band without other fastening means than the merewedging engagement with keepers on. the band and bendable tongues adapted to be, bent aroundone edgaof the band at the"- smaller edge of the wedge plates, thus p'ermitting any one-of the worn sectionsto be removed and replaced by new ones independently of the other sections. Other objects and uses .will be brought out in the following description:-

In the drawings: Figure 1 is a longitudinal sectional View of a portion of a brake-band equipped with my improved sectional lining.

.Figure 2 is an inner face view of a portion of the same brake-band showing the manner of fastening the sections thereto.

Figure 3 is a transverse sectional View taken on line 33, Figure 2. The brake-band as 1 preferably consists of a flat, strip of sheet metal bent into circular form of nearly circumferential length of the revoluble -drum-with which it is adapted to cooperate for braking purposes and is carried by a bracket 2- adapted to be secured to some stationary part of the machine upon which the brake drum is mounted and is also provided with a lug 3 for attachment to an expanding and contracting device not shown, but commonly used with expansible and contractible' brake-bands of this character.

A series of relatively short keeper plates -4.- are secured by rivets 5' to the 1922 Serial' no. 665,118.

face-of brake-band preferably in uniform' longitudinally spaced relation to extend from edge to edge of the band, each keeper plate-being wedge-shaped or rather having its opposite: edges tapered or converging in one directiontransversely of the band and provided with 'grooves"-6 adjacent, the inner faces of the band, thereby forming flanges 7-' at the inner sides of the grooves and also tapered in the same direction.

{The lining for engaging the brake drum preferably consists ofa series 'of sections '8- alternating with the keepers '4 and of" substantially the same cylindrical length as the distance between adjacent keepers, each section comprising a metal locking plate 9 and a friction plate 10 'of any suitable material secured by rivets 11 to the locking plate The spaces between thekeeper plates 4 is somewhat greater than the circum ferential width of said keeper plates and therefore, the locking plates '9' are of greater length than-lithe corresponding length of thelkeeper plates.

The opposite ends of thelocking plates 9' extend short distances beyond the corresponding endsv of the adjacent friction plate 10 so as to project into the grooves .6 of the adjacent keeper plates 4 and. are also wedge-shaped or tapered transversely of the band to conform to the taper of the opposite edges'of said keeper plates. That is, the opposite edges of the keeper plates are tapered transversely in one direction while the opposite ends of the locking plates. are tapered transversely in the opposite direction so as to wedge against the adjacent edges of the keeper plates inthe grooves 6- when inserted in operative position whereby the flanges 7 serve to hold the locking plates against inward dis placement while the outer faces of the locking plates-rest against the inner face of the band 1.

The shorter longitudinal edge of each locking plate 9 is provided with a plurality of bendable tongues 12, which normally stand out straight from the plate when the latter is being inserted between the 'keeper plates 4 and extendbeyond the corresponding edge of the brake band across and under which they are bent as shown in Figure 2 to hold the locking plates against around the adjacent edgeof the band 1.

to clinch the sections in operative position.

In order to remove any one of the sections, its tongues 12 are rebent by a suitable chisel or pliers totheir straightened position as shown by dotted lines in Figure. 3 whereupon the section may be driven laterally out of wedging engagement with the adjacent keeperplates to permit the reinsertion of the new section if desired in the manner previously described.

What I claim is 1. The combinationwitha brake band,

' keeper plates secured to the inner face of the brake-band in circumferentially spaced relation, and liner sections inserted between and against adjacent keeper sections and also against the inner face of the brake-band and provided with tongues bent across and against one edge of the band.

2. In combination with a brake-band, keeper plates secured to the inner face of the brake-band in circumferentially spaced relation and having their opposite longitudinal edges tapered in one direction, and

liner sections seated on the inner face of the band between the keeper sections and having their opposite ends tapered in the opposite I directionsfrom those of the keeper plates for wedging engagement therewith.

3. In combination with a brake-band, keeper plates secured to the inner face of the brake-band in circumferentially spaced relation and having their opposite longitudinal edges taperedin one direction, and liner sections seated on the inner face of the band between the keeper sections and having their opposite ends tapered in the opposite directions from those of the keeper plates for wedging engagement tl1erewitli,-said keeper plates having flanges overlapping upon the adjacent ends of the liner sections.

4. In combination with a brake-band, keeper plates secured to-the inner face of the brake-band in circumferentially spaced relation and having their opposite longitudinal edges tapered in one direction, and liner sections seated on the inner face of the band between the keeper sections and having their opposite ends tapered in the opposite directions from those of the keeper plates for wedging engagement therewith, the smaller ends of the liner sections being provided with bendable tongues bent over and upon the adjacent edge of the band.'

, 5. The combination with a brake-band having transversely tapered abutments in circumferentiallyspaced relation, and transversely tapered liner plates wedgin between adjacent abutments and provid with bendable tongues at their smaller ends bent over and upon the adjacent edge of the band. 7

In witness whereof I have hereunto set my hand this 22nd day of May, 1922.

I i FRANK A. VAIL. Witnesses: Y I I E. J. FL rNN, L. S. DEinPsEY. 

